I know if I were in the Forbes 400 like David Whitemire Hearst Jr., and I had a foundation set up to hold my collection of pristine and/or restored pedal cars, I'd certainly lend them to a museum. But only if that museum was built into a retrofitted department store in downtown Riverside, and then only if they promised to hang all of them from the ceiling.
As if you wouldn't.
Vehicles of Imagination: A Selection of Pedal Cars from the David Whitmire Hearst Jr. Foundation Collection, Culver Center for the Arts, UC Riverside, Oct 07, 2010 - Dec 31, 2010 [culvercenter.ucr.edu via @artwhirled]
flickr user Mr38 has a nice collection of photos from the show [flickr]